# -*- coding: utf-8 -*- #
# Copyright 2023 Google LLC. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
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"""Command for getting a route policy from a Compute Engine router."""


from googlecloudsdk.api_lib.compute import base_classes
from googlecloudsdk.calliope import base
from googlecloudsdk.command_lib.compute import flags as compute_flags
from googlecloudsdk.command_lib.compute.routers import flags


@base.UniverseCompatible
class GetRoutePolicy(base.DescribeCommand):
  """Get a route policy from a Compute Engine router."""

  ROUTER_ARG = None

  @classmethod
  def Args(cls, parser):
    GetRoutePolicy.ROUTER_ARG = flags.RouterArgument()
    GetRoutePolicy.ROUTER_ARG.AddArgument(parser, operation_type='get')
    parser.add_argument(
        '--policy-name',
        help="""Name of the route policy to get.""",
        required=True,
    )

  def Run(self, args):
    """Issues the request necessary for getting a route policy from a Router."""
    holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
    client = holder.client

    router_ref = GetRoutePolicy.ROUTER_ARG.ResolveAsResource(
        args,
        holder.resources,
        scope_lister=compute_flags.GetDefaultScopeLister(client),
    )

    request = (
        client.apitools_client.routers,
        'GetRoutePolicy',
        client.messages.ComputeRoutersGetRoutePolicyRequest(
            **router_ref.AsDict(), policy=args.policy_name
        ),
    )

    return client.MakeRequests([request])[0]


GetRoutePolicy.detailed_help = {
    'DESCRIPTION': """\
  *{command}* gets a route policy from a Compute Engine router.
  """,
    'EXAMPLES': """\
          To get a route policy `my-policy` from a router `my-router` in region `us-central1`, run:

            $ {command} my-router --region=us-central1 --policy-name=my-policy

          """,
}
